(Not sure if this is the right exchange for this kind of question, so feel free to transfer it somewhere else.)
I just recently rediscovered that I have the Beeline Reader extension installed in my browser and have used it to read through some longer texts on my laptop.
If you are not familiar with the concept, it works by highlighting the end of the current and the beginning of the next line in the same color. There is an example on the frontpage of their side so I won't go into detail.
My guess is that this kind of text presentation would be applicable to printed text too. Newspapers and books could be printed this way with no penalty on readability (there is even a grayscale mode).
Certainly it would be unusual to have text printed this way and there would be readers displeased with the aesthetics, but my guess is that most readers would be quite comfortable one accustomed.
To make this a hard question:
- Have there been any experiments with using BeelineReading or similiar color highlightings in print?
- If so, what was the impact on the users reading capabilities and how well did they get accustomed to the highlightings?